Key is to make sure ‘’it’’ is not an electrical issue = tachycardia/ bradycardia/ blocks ,,,etc. These are serious == strokes , sudden cardiac death,,etc. An EP =electrophysiologist is key doc. Of course , histories , genetics , cardiovascular flows, recent med changes , overweight, drinking ,====etc. all are needed considerations..
ECG’s, extended ECG’s — even remote long term ILR’s ( ie: Reveal Linx ILR ).
Again — unexplained syncope is very serious —— Much Luck —- many options can help !!